. >> reporter: bart train operators did stop, the quake to small to trigger the new system we told you about yesterday. it gives a warning. >> moderate, shaking expected in five, second. >> reporter: it's the nation's first quake early warning system designed to slow trains and alert your cell phone or computer but proposed budget cuts would kill it. they have the early warning system in japan, we are behind them. >> reporter: they say $150 million will pay off. >> the benefits out weigh the costs. >> reporter: by stopping trains, warning pilots not to land and doctors to stop operating. and everybody to seek safety. >> big quake we know is coming eventually. i mean every day i can't stop thinking about what will happen when that hits. >> john fowler reporting. >> caltrans alerting drivers about upcoming closuring of the san mateo bridge. the entire span will be shut down over two weekends next month. the closures will be from 10:00 p.m. friday until 5:00 a.m. monday. crews will install a new joint and will replace 60 feet the bridge deck. they will repair a cracked beam found two year